Apple's base iPhone 18 models will miss the RAM threshold required for its most powerful AI features, creating an awkward trade-off between cost control and software capability.
Supply chain analyst Ming-Chi Kuo posted Friday that the iPhone 18 and iPhone 18e will ship with 9GB of DRAM when they launch in spring 2027, a 1GB increase over the iPhone 17, but well short of the 12GB that earlier rumors predicted. The Pro models, arriving this fall, will keep 12GB. The configuration is unusual.
Kuo says the A20 chip will use six 1.5GB dies for a total of 9GB, replacing the four 2GB dies (8GB total) in current A19-based iPhones. The higher-end iPhone 18 Pro, Pro Max, and foldable iPhone will use eight 1.5GB dies for 12GB. The 9GB figure lands directly between Apple's stated requirements.
The company confirmed at WWDC 2026 that its most capable on-device AI model, the engine behind enhanced Siri voices and system-wide dictation improvements, requires 12GB RAM. The current iPhone 17 with 8GB doesn't qualify. Neither, on paper, would the iPhone 18.
That leaves Apple with two options: lower the 12GB requirement to accommodate 9GB devices, or gatekeep the best AI features behind Pro models. Kuo's post suggests the A20 chip's efficiency gains may help narrow the gap, but Apple has not confirmed which iOS 27 capabilities will reach the base iPhone 18. The memory compromise stems from a brutal component market.
Apple CEO Tim Cook described the surge in memory and storage costs as a "hundred year flood," and Apple raised prices across its Mac and iPad lines on Thursday. The A20 chip itself is expensive, supply chain reports peg its cost at roughly $280 per unit, about 80% higher than the A19.
Kuo's report fits a pattern of Apple cutting costs on its standard models. Earlier this year, Weibo leaker Fixed Focus Digital reported Apple implemented manufacturing downgrades on the iPhone 18, bringing its components closer to the cheaper iPhone 18e with some parts interchangeable between the two devices.
Despite the RAM shortfall, the iPhone 18 and 18e will still get the 2nm A20 chip, a meaningful leap from the current 3nm generation. Performance gains are projected at up to 15% faster speeds and up to 30% better power efficiency than the A19 in today's iPhone 17. The shift to 2nm packs more transistors per chip, which could help the base models handle AI workloads more efficiently even with less RAM.
The iPhone 18 and 18e are expected to launch around March or April 2027, breaking from Apple's traditional September cycle. The Pro models arrive first in fall 2026.
Apple has not commented on pricing, but recent across-the-board price hikes on Macs and iPads suggest the iPhone 18 lineup won't be immune.
